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JUNE 1ST - SINUS IRIDUM / N IMBRIUM - DARK MARE - ALPINE VALLEY


paulastro

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I was out observing from about 9.25 pm to 11.00 pm, using the SW 120ED, on an Ercole mount. The Gibbous Moon was 79,9% illuminated and 10.15 days old.  The Sinus Iridum showed great detail on the terminator and the N of M Imbrium was also well  placed.  Many of the principle areas of dark Mare were also nicely on view, often neglected by observers, but I find them quite fascinating.

At first the seeing was very tremulous but there were some fleetingly good moments giving good views.  I was alerted by a text message by mikeDnight before I went out saying that he could see the central rille which meanders down the centre of the Alpine Valley.  When the seeing had settled a little I took a look and indeed, in the better moments it did come into view, particularly in the N (NE), and smoother, part of the valley.  It was hard work but was visible intermittently from about 9.35 to 10 pm. when the seeing deteriorated.  I have seen it before on a few occasions,  but not many times, and the lighting has to be just right.  So thanks for the alert Mike, much appreciated.

I took a few single frames with the Olympus E-M5 Mk11 and I made a couple of crops to show the Sinus Iridum/ N Imbrium area and also to show the areas of dark mare.

 

37228803_P6010911Moon.thumb.jpg.d2527dfb32c2ead4af6f4efceae1a30c.jpg

38735615_P6010911AreasofDarkMare.jpg.fa5283f645cecff5db3406089d189194.jpg

 

780949102_P6010828SinusIridumNImbriumandMareFrigoris.jpg.c2e78dd6f336b858278a1f0ec7b294d1.jpg

 

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